Added a way to get build configuration info from the agent. (#9913)

* Add a way to get build configuration info from the agent.

This adds a new option to the `-W` switch called 'buildinfo'. When
invoked with this argument, Netdata will print it's version, the
configure options, and a list of optional features and whether they are
enabled or not.

This is intended to serve three purposes:

* It allows developers to more quickly get an idea of how Netdata was
  built when triaging bug reports.
* It provides an easier way to validate changes to the build system that
  affect optional features during the development cycle.
* It provides an easier way to build CI workflows that validate that
  building under a given set of constraints results in a feature being
  enabled or not.

The actual implementation is a bit large but overall exceedingly simple,
consisting of a set of preprocessor directives to extract optional
feature state information from config.h and then a series of printf()
calls to actually report this info (which should end up optimized by
smart compilers due to all the arguments being compile-time constants).

* Added zlib to optional libraries.

* Added remaining optional plugins to buildinfo output.

* Changed formatting to be more human friendly.

* Add remaining optional libraries.

* Fix up formatting to be even more human friendly.

* Fix typo in buildinfo output.

* Remove unused variable.

* Fixed spelling of config.h option name.

* Update daemon/buildinfo.c

Co-authored-by: Markos Fountoulakis <44345837+mfundul@users.noreply.github.com>

* Fix option name mismatch for libcrypto.

* Update daemon/buildinfo.c

Co-authored-by: Markos Fountoulakis <44345837+mfundul@users.noreply.github.com>

Co-authored-by: Markos Fountoulakis <44345837+mfundul@users.noreply.github.com>

3 files changed, 228 insertions, 0 deletions

diff --git a/daemon/buildinfo.c b/daemon/buildinfo.c
new file mode 100644
index 0000000000..e015e396d3
--- /dev/null
+++ b/daemon/buildinfo.c
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <stdio.h>
+#include "./config.h"
+
+// Optional features
+
+#ifdef ENABLE_ACLK
+#define FEAT_CLOUD "YES"
+#else
+#define FEAT_CLOUD "NO"
+#endif
+
+#ifdef ENABLE_DBENGINE
+#define FEAT_DBENGINE "YES"
+#else
+#define FEAT_DBENGINE "NO"
+#endif
+
+#if defined(HAVE_X509_VERIFY_PARAM_set1_host) && HAVE_X509_VERIFY_PARAM_set1_host == 1
+#define FEAT_TLS_HOST_VERIFY "YES"
+#else
+#define FEAT_TLS_HOST_VERIFY "NO"
+#endif
+
+#ifdef ENABLE_HTTPS
+#define FEAT_NATIVE_HTTPS "YES"
+#else
+#define FEAT_NATIVE_HTTPS "NO"
+#endif
+
+// Optional libraries
+
+#ifdef ENABLE_JSONC
+#define FEAT_JSONC "YES"
+#else
+#define FEAT_JSONC "NO"
+#endif
+
+#ifdef ENABLE_JEMALLOC
+#define FEAT_JEMALLOC "YES"
+#else
+#define FEAT_JEMALLOC "NO"
+#endif
+
+#ifdef ENABLE_TCMALLOC
+#define FEAT_TCMALLOC "YES"
+#else
+#define FEAT_TCMALLOC "NO"
+#endif
+
+#ifdef HAVE_CAPABILITY
+#define FEAT_LIBCAP "YES"
+#else
+#define FEAT_LIBCAP "NO"
+#endif
+
+#ifdef ACLK_NO_LIBMOSQ
+#define FEAT_MOSQUITTO "NO"
+#else
+#define FEAT_MOSQUITTO "YES"
+#endif
+
+#ifdef ACLK_NO_LWS
+#define FEAT_LWS "NO"
+#else
+#define FEAT_LWS "YES"
+#endif
+
+#ifdef NETDATA_WITH_ZLIB
+#define FEAT_ZLIB "YES"
+#else
+#define FEAT_ZLIB "NO"
+#endif
+
+#ifdef STORAGE_WITH_MATH
+#define FEAT_LIBM "YES"
+#else
+#define FEAT_LIBM "NO"
+#endif
+
+#ifdef HAVE_CRYPTO
+#define FEAT_CRYPTO "YES"
+#else
+#define FEAT_CRYPTO "NO"
+#endif
+
+// Optional plugins
+
+#ifdef ENABLE_APPS_PLUGIN
+#define FEAT_APPS_PLUGIN "YES"
+#else
+#define FEAT_APPS_PLUGIN "NO"
+#endif
+
+#ifdef HAVE_FREEIPMI
+#define FEAT_IPMI "YES"
+#else
+#define FEAT_IPMI "NO"
+#endif
+
+#ifdef HAVE_CUPS
+#define FEAT_CUPS "YES"
+#else
+#define FEAT_CUPS "NO"
+#endif
+
+#ifdef HAVE_LIBMNL
+#define FEAT_NFACCT "YES"
+#else
+#define FEAT_NFACCT "NO"
+#endif
+
+#ifdef HAVE_LIBXENSTAT
+#define FEAT_XEN "YES"
+#else
+#define FEAT_XEN "NO"
+#endif
+
+#ifdef HAVE_XENSTAT_VBD_ERROR
+#define FEAT_XEN_VBD_ERROR "YES"
+#else
+#define FEAT_XEN_VBD_ERROR "NO"
+#endif
+
+#ifdef HAVE_LIBBPF
+#define FEAT_EBPF "YES"
+#else
+#define FEAT_EBPF "NO"
+#endif
+
+#ifdef HAVE_SETNS
+#define FEAT_CGROUP_NET "YES"
+#else
+#define FEAT_CGROUP_NET "NO"
+#endif
+
+#ifdef ENABLE_PERF_PLUGIN
+#define FEAT_PERF "YES"
+#else
+#define FEAT_PERF "NO"
+#endif
+
+#ifdef ENABLE_SLABINFO
+#define FEAT_SLABINFO "YES"
+#else
+#define FEAT_SLABINFO "NO"
+#endif
+
+// Optional Exporters
+
+#ifdef HAVE_KINESIS
+#define FEAT_KINESIS "YES"
+#else
+#define FEAT_KINESIS "NO"
+#endif
+
+#ifdef ENABLE_EXPORTING_PUBSUB
+#define FEAT_PUBSUB "YES"
+#else
+#define FEAT_PUBSUB "NO"
+#endif
+
+#ifdef HAVE_MONGOC
+#define FEAT_MONGO "YES"
+#else
+#define FEAT_MONGO "NO"
+#endif
+
+#ifdef ENABLE_PROMETHEUS_REMOTE_WRITE
+#define FEAT_REMOTE_WRITE "YES"
+#else
+#define FEAT_REMOTE_WRITE "NO"
+#endif
+
+
+void print_build_info(void) {
+    printf("Configure options: %s\n", CONFIGURE_COMMAND);
+
+    printf("Features:\n");
+    printf("    dbengine:                %s\n", FEAT_DBENGINE);
+    printf("    Native HTTPS:            %s\n", FEAT_NATIVE_HTTPS);
+    printf("    Netdata Cloud:           %s\n", FEAT_CLOUD);
+    printf("    TLS Host Verification:   %s\n", FEAT_TLS_HOST_VERIFY);
+
+    printf("Libraries:\n");
+    printf("    jemalloc:                %s\n", FEAT_JEMALLOC);
+    printf("    JSON-C:                  %s\n", FEAT_JSONC);
+    printf("    libcap:                  %s\n", FEAT_LIBCAP);
+    printf("    libcrypto:               %s\n", FEAT_CRYPTO);
+    printf("    libm:                    %s\n", FEAT_LIBM);
+    printf("    LWS:                     %s\n", FEAT_LWS);
+    printf("    mosquitto:               %s\n", FEAT_MOSQUITTO);
+    printf("    tcalloc:                 %s\n", FEAT_TCMALLOC);
+    printf("    zlib:                    %s\n", FEAT_ZLIB);
+
+    printf("Plugins:\n");
+    printf("    apps:                    %s\n", FEAT_APPS_PLUGIN);
+    printf("    cgroup Network Tracking: %s\n", FEAT_CGROUP_NET);
+    printf("    CUPS:                    %s\n", FEAT_CUPS);
+    printf("    EBPF:                    %s\n", FEAT_EBPF);
+    printf("    IPMI:                    %s\n", FEAT_IPMI);
+    printf("    NFACCT:                  %s\n", FEAT_NFACCT);
+    printf("    perf:                    %s\n", FEAT_PERF);
+    printf("    slabinfo:                %s\n", FEAT_SLABINFO);
+    printf("    Xen:                     %s\n", FEAT_XEN);
+    printf("    Xen VBD Error Tracking:  %s\n", FEAT_XEN_VBD_ERROR);
+
+    printf("Exporters:\n");
+    printf("    AWS Kinesis:             %s\n", FEAT_KINESIS);
+    printf("    GCP PubSub:              %s\n", FEAT_PUBSUB);
+    printf("    MongoDB:                 %s\n", FEAT_MONGO);
+    printf("    Prometheus Remote Write: %s\n", FEAT_REMOTE_WRITE);
+};
diff --git a/daemon/buildinfo.h b/daemon/buildinfo.h
new file mode 100644
index 0000000000..76912ea672
--- /dev/null
+++ b/daemon/buildinfo.h
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_BUILDINFO_H
+#define NETDATA_BUILDINFO_H 1
+
+extern void print_build_info(void);
+
+#endif // NETDATA_BUILDINFO_H
diff --git a/daemon/main.c b/daemon/main.c
index d8b32d6269..ee45e6b3a4 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include "common.h"
+#include "buildinfo.h"
 
 int netdata_zero_metrics_enabled;
 int netdata_anonymous_statistics_enabled;
@@ -1255,6 +1256,11 @@ int main(int argc, char **argv) {
                             /* will trigger a claiming attempt when the agent is initialized */
                             claiming_pending_arguments = optarg + strlen(claim_string);
                         }
+                        else if(strcmp(optarg, "buildinfo") == 0) {
+                            printf("Version: %s %s\n", program_name, program_version);
+                            print_build_info();
+                            return 0;
+                        }
                         else {
                             fprintf(stderr, "Unknown -W parameter '%s'\n", optarg);
                             return help(1);